Question

我正试图建立一个单元,一个有某些文字的栏目和一个检查箱,作为所有检查箱的选用(见下面的图表,“cb”是检查箱)。目前,我使用的是从头盔中得出的一个等级,并且凌驾于这一等级,使案文和检查箱产生结果的方法。我在BrowserEvent(BrowserEvent)上倒台,但是,这只是给我一些死灰复燃的事件,除非检查箱正确运作,否则会做罚款。是否有人对此有任何想法?

+-------+------------+
| col 1 | Select All |
|       |     cb     | 
+-------+------------+
| row 1 |     cb     |
+-------+------------+

The issues I m having with the checkbox is that when it s not checked, you have to click it twice for the checkmark to appear (at least on Chrome), even though it s "checked" property is true the first time. One click unchecks it correctly.

Here is some code:

Setup the CellTable columns:

/** Setup the table s columns. */
private void setupTableColumns() {
    // Add the first column:
    TextColumn<MyObject> column1 = new TextColumn<MyObject>() {
        @Override
        public String getValue(final MyObject object) {
            return object.getColumn1Text();
        }
    };
    table.addColumn(macColumn, SafeHtmlUtils.fromSafeConstant("Column1"));

    // the checkbox column for selecting the lease
    Column<MyObject, Boolean> checkColumn = new Column<MyObject, Boolean>(
            new CheckboxCell(true, false)) {
        @Override
        public Boolean getValue(final MyObject object) {
            return selectionModel.isSelected(object);
        }
    };

    SelectAllHeader selectAll = new SelectAllHeader();
    selectAll.setSelectAllHandler(new SelectHandler());
    table.addColumn(checkColumn, selectAll);
}

My Select All Header:

public static class SelectAllHeader extends Header<Boolean> {
    private final String checkboxID = "selectAllCheckbox";
    private ISelectAllHandler handler = null;

    @Override
    public void render(final Context context, final SafeHtmlBuilder sb) {
        String html = "<div>Select All<div><input type="checkbox" id="" + checkboxID + ""/>";

        sb.appendHtmlConstant(html);
    }

    private final Boolean allSelected;

    public SelectAllHeader() {
        super(new CheckboxCell());

        allSelected = false;
    }

    @Override
    public Boolean getValue() {
        Element checkboxElem = DOM.getElementById(checkboxID);

        return checkboxElem.getPropertyBoolean("checked");

    }

    @Override
    public void onBrowserEvent(final Context context, final Element element, final NativeEvent event) {
        Event evt = Event.as(event);
        int eventType = evt.getTypeInt();

        super.onBrowserEvent(context, element, event);

        switch (eventType) {
            case Event.ONCHANGE:
                handler.onSelectAllClicked(getValue());
                event.preventDefault();
                break;

            default:
                break;
        }

    }


    public void setSelectAllHandler(final ISelectAllHandler handler) {
        this.handler = handler;
    }

}

Answer 1

它希望你在担任负责人时,能够重新设置一个不受检查的检查箱,每当囚室的再收留人时,这就有可能抹去甄选国家。

储存被检查的国家,并将检查箱送至国家。顺便提一下,你只读了<条码>。

http://www.ohchr.org。这里只是为桑塔文撰写的一份工作执行文件一(见。哈斯维埃接口得以实施,以便能够以标准方式处理价值变化事件。如果你希望这样做,我就没有推翻了翻译方法,确保你使用<条码>植被/代码>,以确定你是否做了检查或没有检查的检查箱。甄选/选任逻辑在相关的导师班中处理(见。

private class CheckboxHeader extends Header<Boolean> implements HasValue<Boolean> {

   private boolean checked;
   private HandlerManager handlerManager;

   public CheckboxHeader()
   {
      //TODO consider custom cell with text
      super(new CheckboxCell());
      checked = false;
   }

   // This method is invoked to pass the value to the CheckboxCell s render method
   @Override
   public Boolean getValue()
   {
      return checked;
   }

   @Override
   public void onBrowserEvent(Context context, Element elem, NativeEvent nativeEvent)
   {
      int eventType = Event.as(nativeEvent).getTypeInt();
      if (eventType == Event.ONCHANGE)
      {
         nativeEvent.preventDefault();
         //use value setter to easily fire change event to handlers
         setValue(!checked, true);
      }
   }

   @Override
   public HandlerRegistration addValueChangeHandler(ValueChangeHandler<Boolean> handler)
   {
      return ensureHandlerManager().addHandler(ValueChangeEvent.getType(), handler);
   }

   @Override
   public void fireEvent(GwtEvent<?> event)
   {
      ensureHandlerManager().fireEvent(event);
   }

   @Override
   public void setValue(Boolean value)
   {
      checked = value;
   }

   @Override
   public void setValue(Boolean value, boolean fireEvents)
   {
      checked = value;
      if (fireEvents)
      {
         ValueChangeEvent.fire(this, value);
      }
   }

   private HandlerManager ensureHandlerManager()
   {
      if (handlerManager == null)
      {
         handlerManager = new HandlerManager(this);
      }
      return handlerManager;
   }
}

Setup the CellTable columns:

My Select All Header:

友情链接